Nut-lock.



No. 720,505. PATENTED FEB.1'0,1903. B. TUCKER. y

NUT LOGK.

APPLICATION FILED SEPT. 10, 1902.

' no uonnL.

W/TNE SSE S: IN VE N TOR f ATTORNEYS.

UNITED STATES PATENT OFFICE.

BENJAMIN TUCKER, OF MONOTON, CANADA.

NUT-LOCK.

SPECIFICATION forming part of Letters Patent No. 720,505, dated February10, 1903. Application filed September 1 0, 1902. Serial No. 122,819. (Nomodel.)

T0 or whom it may concern:

Be it known that I, BENJAMIN TUCKER, a subject of the King of GreatBritain, and a resident of Moncton, in the Province of New Brunswick andDominion of Canada, have invented new and useful Improvements in Nut-Locks, of which the following is afull, clear,

and exact description.

The object of this invention is to provide a nut-lock of novel simpleconstruction that may be readily applied upon the threaded end of ascrew-bolt and that will hold a nut that is screwed upon the bolt fromremoval until the nut-lock is purposely released.

The invention consists in the novel construction and combination ofparts, as is hereinafter described, and defined in the appended claims.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar characters of reference indicatecorresponding parts in all the figures.

Figure 1 is a perspective View of a bolt, a nut thereon, and theimproved nut lock mounted on the threaded end of the bolt and arrangedto secure the nut from accidental removal. Fig. 2 is a side view of thenutlock. Fig. 3 is an edge View of thesame seen in the direction of thearrow or in Fig. 1, and Fig. 4 is an edge view of the nut-lock seen inthe direction of the arrow :0 in' Fig. 2.

The improved nut-lock is adapted for use on screw-bolts of any sizewithout requiring a special construction of the bolt or the nut thatscrews thereon and which is to be held from unscrewing.

The nut-lock comprises a flat block 5, havin g suitable thickness and apreferably quadrangular form edgewise; but this is notiminternally-threaded block 5 a spring-dog 6 is' formed or secured byone end.

Preferably the dog 6 and block 5 are formed integrally of resilientmetal, and an offset is produced at b, where the heel c of the dog isjoined with the block at one corner thereof,

so that the body of the dog will be disposed at the normal outer side ofthe block 5, as is clearly shown in Figs. 1 and 2.

The material forming the dog 6 is tapered edgewise from the heel 0thereof to its free end, this sloping formation being produced on theouter edge, the opposite edge of the dog that is nearest to the outerface of theblock 5 being parallel therewith and having sufficientclearance therefrom to permit the sharpened free end e of the dog tovibrate a proper degree. The body of the dog 6 is curved into hook form,so as to dispose its free end e at the edge of the threaded orifice aand normally projecting somewhat across said edge, which will cause thesharpened free end of the dog to be pressed upon the thread at of thebolt.

I It will be seen that when the nut A is screwed upon the threaded bodyof the bolt A a proper distance the block 5, if screwed on the bolt end,so asto forcibly impinge upon the nut A, will serve as a jam-nut andprevent a turning movement of the nut A until the block 5 is unscrewedfrom the bolt. end sufficient to release the nut.

When the block 5 is screwed onto the bolt end toward and into contactwith the nut A, the sharpened free end eof the dog 6 will be pressedupon the thread d of the bolt by the resilience of the dog and bitethereon, so as to preventa turning movement of the dog until it isreleased from enforced contact with the bolt-thread.

To conveniently release the spring-dog 6 from the thread 01 of the boltA, I may employ a key B, (shown by dotted lines in Fig.

1,) which implement, it inserted in the bow portion of the spring-dogand turned in the direction of the curved arrow 4%, will release the dogfrom its enforced contact with the bo1t-thread d and permit the nut-lockto be turned in a direction opposite from that indicated by the arrow 00which will release the nut A. e

As the improved nut-lock may be readily applied Without injury to a boltor nut it is to lock in place on the bolt-thread and may be removed orrelaxed from pressure on the nut it has had looked engagement with,itwill be seen that the improvement is very serviceable and adapted forgeneral use on bolts of various sizes that have nuts which theimprovement will effectively lock against accidental displacement.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- 1. A nut-lock comprising a flat angular block havinga central threaded orifice therein, and a spring-dog formed on onecorner of the block by offsetting the heel of the dog from said corner,thus disposing the body of the dog at the outer side of the block, saiddog having a hook-like form, and sloped on one edge from the heel to thefree end thereof, that is projected over the edge of the threadedorifice.

2. The combination with a bolt and a nut screwed thereon, of a flatquadrangular block having a central orifice, a thread in said orificethat adapts the block to screw upon the bolt-thread and jam the blockagainst the nut, and a hook-shaped spring-dog integral with the blockand formed at one corner of the block by offsetting the heel of the dog,so that one edge of the dog will be parallel with the adjacent face ofthe block, the other edge thereof sloping toward the free end of thedog, which end is sharpened and projects over the threaded orifice inthe block, so as to bear upon the bolt-thread when the block is jammedagainst the nut.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing Witnesses.

BENJAMIN TUCKER.

Witnesses:

WM. H. A. STARKEY, FRANCIS J. SWEENEY.

